today=new Date();
jran=today.getTime();

function rnd() {

    ia=9301;
    ic=49297;
    im=233280;

    jran = (jran*ia+ic) % im;
    return jran/(im*1.0);
};

function rand(number) {

    return Math.ceil(rnd()*number);
};


for(i=1;i<=1;i++) {
    myNum=(rand(4)); //????????????;
    if(myNum == 1) document.write("<img src='images/white.jpg'>"); 
if(myNum == 2) document.write("<img src='images/ban_2.jpg'>"); //????,??http://
if(myNum == 3) document.write("<img src='images/ban_3.jpg'>"); 
if(myNum == 4) document.write("<img src='images/ban_4.jpg'>"); 


    else {
document.write();
}

};